/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.inspur.edp.udt.generator.api.typeprocessers.persistencevaluereader;

import com.inspur.edp.caf.generator.baseInfo.ParameterInfo;
import com.inspur.edp.caf.generator.baseInfo.TypeInfo;
import com.inspur.edp.caf.generator.utils.ExpressionUtils;
import com.inspur.edp.cef.repository.typetransprocesser.Bool2CharProcesser;
import com.inspur.edp.cef.repository.typetransprocesser.DecimalTransProcesser;
import com.inspur.edp.cef.repository.typetransprocesser.IntTransProcesser;
import com.inspur.edp.udt.generator.UdtGeneratorContext;
import java.util.ArrayList;
import lombok.var;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.MethodInvocation;
import org.eclipse.jdt.core.dom.ReturnStatement;
import org.eclipse.jdt.core.dom.Statement;

public class NullableTransPersistenceValueReaderGenerator extends UdtGetPersistenceValueMethodGenerator {
  protected final Class processorType;
  protected final String propertyName;
  protected final UdtGeneratorContext udtGenCtx;

  protected final static String ParIsNull = "isNull";

  protected final static String valueVarName = "value";
  protected final static String asDataVarName = "cdata";

  public NullableTransPersistenceValueReaderGenerator(UdtGeneratorContext udtGenCtx,
      Class processorType, String propertyName) {
    this.processorType = processorType;
    this.propertyName = propertyName;
    this.udtGenCtx = udtGenCtx;
  }

  private Statement getAsStatement() {
    String udtTypeFullName = udtGenCtx.getUdt().getGeneratedEntityClassInfo().getClassFullName();
    var frag = ast.newVariableDeclarationFragment();
    var castExpression = ast.newCastExpression();
    castExpression.setType(ast.newSimpleType(ast.newName(udtTypeFullName)));
    castExpression.setExpression(ast.newSimpleName("data"));
    frag.setInitializer(castExpression);
    frag.setName(ast.newSimpleName(asDataVarName));
    var statement = ast.newVariableDeclarationStatement(frag);
    statement.setType(ast.newSimpleType(ast.newName(udtTypeFullName)));
    return statement;
  }

  protected Statement getPropValueStatement() {
    var frag = ast.newVariableDeclarationFragment();
    var invocation = ExpressionUtils.getMethodInvocation(ast, asDataVarName, "get" + propertyName);
    frag.setInitializer(invocation);
    frag.setName(ast.newSimpleName(valueVarName));
    var statement = ast.newVariableDeclarationStatement(frag);
    statement.setType(ast.newSimpleType(ast.newSimpleName("Object")));

    return statement;
  }

  private ReturnStatement getReturnStatement() {
    MethodInvocation transInvocation = buildTransInvocation();

//        if(processorType == Bool2CharProcesser.class
//            || processorType == IntTransProcesser.class
//            || processorType == DecimalTransProcesser.class){
//            transInvocation.arguments().add(ast.newBooleanLiteral(true));
//        }
    var returnStatement = ast.newReturnStatement();
    returnStatement.setExpression(transInvocation);
    return returnStatement;
  }

  protected MethodInvocation buildTransInvocation() {
    var invocation = ast.newMethodInvocation();
    invocation.setExpression(ast.newName(processorType.getTypeName()));
    invocation.setName(ast.newSimpleName("getInstacne"));

    var transInvocation = ExpressionUtils.getMethodInvocation(ast, invocation, "transType");
    transInvocation.arguments().add(ast.newSimpleName(valueVarName ));

    if (processorType == Bool2CharProcesser.class
        || processorType == IntTransProcesser.class
        || processorType == DecimalTransProcesser.class) {
      transInvocation.arguments().add(ast.newSimpleName(ParIsNull));
    }

    return transInvocation;
  }

  @Override
  protected Block buildMethodBody() {

    var block = ast.newBlock();
    block.statements().add(getAsStatement());
    block.statements().add(getPropValueStatement());
    block.statements().add(getReturnStatement());
    return block;
  }

  @Override
  protected ArrayList<ParameterInfo> getParameterCollection() {
    ArrayList<ParameterInfo> pars = super.getParameterCollection();

    pars.add(new ParameterInfo() {{
      setParamType(new TypeInfo("boolean"));
      setParamName(ParIsNull);
    }});

    return pars;
  }
}
